Hand-guard for planing-machines.



F. W. HALL & G. W. BUMM.

HAND GUARD FOR PLANING MACHINES.

APPLICATION FILED MAY 31,1906.

WITNESSES P. W. HALL & G. W. BUMM.

HAND GUARD FOR PLANING MACHINES.

APPLICATION FILED MAY 31, 1906.

I 1,001,391. Patented Aug. 22, 1911.

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FREDERICK W. HALL, OF CAMDEN, NEW JERSEY, AND GEORGE W. BUMM, OF PHILA- DELPHIA, PENNSYLVANIA; SAID BUMM ASSIGNOR TO SAID HALL.

HAND-GUARD FOR PLANING-MACHINES.

Specification of Letters Patent.

Patented A11 22, 1911.

Application filed May 31, 1906. Serial No. 319,433.

To all whom it may concern:

Be it known that we, FREDERICK W. HALL, residing at Camden, New Jersey, and GEORGE W. BUMM, residing at Philadelphia, Pennsylvania, citizens of the United States, have jointly invented a certain new and useful Hand-Guard for Planing-Machines of the Class Known as Hand-Jointers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

Our invention relates to guard devices applicable to that class of planing machines known as hand-jointers, wherein lumber is necessarily fed by the operator to the knives of the jointing machine in such manner as to unduly expose his hands to the risk of being cut, such accidents with such machines being of very common occurrence.

Our invention is of a guard to be applied to such class of machines having for its object to protect the hands of the operator from the risk of such accidents; and to that end it consists of the device hereinafter described comprising the novel elements and combination and arrangement of them, as pointed out in the appended claims; and these may be stated generally as consisting of a guard plate which is preferably centrally concaved on its under-face and having upwardly-extending cars at its rearward edge, which fixedly support between them a rod suitably journaled in an uprightbiacket adapted to be mounted on the frame or bedplate of the jointing machine, with means to vertically adjust the journal bracket; whereby the guard plate is free to be manually swung, by its opposite free edge, in a vertically inclined direction on the aforesaid pivotal mounting of the opposite longitudinal edge, its free edge normally resting by grav ity on the bed-plate and over the knives of the machine; a hand rail or other suitable means to conveniently .lift the guard-plate by its free edge; a friction roller mounted on the underface of said edge of the guard plate to minimize frictional resistance thereof with the board being planed and with the bed-plate of the jointer; and means to adjust the guardplate in a lateral direction, at a Vertical incline from the horizontal when required by the particular kind of planed boards to be produced by the jointing machine.

In the accompanying drawings illustrating our invention :-Figure 1 is a plan view of our guard device as applied to a jointing machine, showing a portion of the guard broken away in order to see the friction roller and its mounting. Fig. 2 is a side view showing a portion of the bed of the machine, and the rotating knife or knives, also showing a board in position to be fed into the machine. Fig. 3 is an enlarged section of the guard-plate, taken on the line 3-3 of Fig. l; and Figs. 1 and 5 show a modified construction of the supporting bracket whereby said bracket may be adjusted both vertically and at various angles from the perpendicular.

The flat bed-plate of a hand-jointing planer is indicated at A, which is some times stepped as at B. The board being planed is indicated at C.

The reference letter 1) indicates the shaft which carries the rotating planing knives, and D the driving pulley therefor.

F indicates the usual adjustable guide on such machines.

In these machines the supporting table A is made in two parts, as indicated in Fig. 2, in order that the knife E may be mounted and rotated in such manner that its cutting points will plane the underfacc of a board pushed over the table; and in the use of such machines the boards are pushed for ward manually by the operator, with the knives out of sight, hence constantly resulting in the operators hands contacting with the knives at the end of the OPOI'fltlOIl. Our guard device prevents such results. It consists of a guard-plate 1 extending from side to side of the bed-plate of the machine, over the rotating knives; the longitudinal center 2 of the underface of the plate 1 being up wardly curved or concaved in order that this face shall never be able to contact with the rotating knife E, when no board is being planed or acted on by the knives.

The rear longitudinal edge of the guard plate 1 is provided with a pair of ears 3, 3, in and between which is fixedly mounted a journal rod 4: (see Fig. 1). An upright bracket 5 centrally bored vertically as-at 6, has a forwardly-extending hub 7 integral therewith, the said hub being bored to provide a journal bearing for the rod 4 of the guard plate. The bracket 5 is supported by an upright squared-rod 8, passing through the central square bore 6 in said bracket and is secured therein at any height of adjust-- ment by means of a screw 9. To mount the device on the planer, through the bracket 5, is provided another bracket 10, provided with ears 11, 11, whereby it may be fixedly fastened by screws 12, 12, to the side of the table A of the planer. This bracket 10 is also centrally square-bored to admit the rod 8, and it may be vertically adjusted therein by means of a screw indicated at 13. It will thus be seen that the rear edge of the guard plate 1 may be adjusted vertically into any horizontal plane relatively to the bed-plate A. of the planer, and the said plate may thus be swung in a vertically inclined direction on the journal rod 1. The front edge of the guard plate 1 is free and rests by gravity, due to its weight, on the board being planed or operated on. The underface of the guard-plate 1 near its said front and free edge is channeled at 14: for nearly its entire width to supply room for a friction roller 15 and means to journal its ends.

Upon the upper face of the guard-plate 1, near its front edge, is provided a pair of bracket ears 16, in and between which is fixedly mounted a hand-lifting rail 17 to more conveniently enable the operator to lift or lower the guard plate 1 to and from the work to be planed. By reference to the several figures of the drawing especially Fig. 2, it will be seen that when the board being planed passes forward beyond the front edge of the guard plate, the friction roller 15 will then rest on the bed-plate A of the planer and absolutely prevent the hands of the operator contacting with the knives, which are always forward of said edge of the guard plate, when the latter is properly set, as shown in Fig. 2.

In Figs. 4 and 5 we have shown two views of a supporting bracket to take the place of the supporting bracket 10 and its parts 11, 12 and 13 heretofore described and shown in Fig. 2. In this modified form, a bracket 18 is provided with cars 11*, 11*, which are secured to the planer frame by screws 19, 19, and the bracket 1O is mounted thereon as hereinafter described; but the bracket 10* is centrally square-bored as before to admit the supporting rod 8, and is provided as before with a setting screw 9 to adjust the rod 8 vertically in the bracket 10. Frequently a board has to be planed 011 a bevel. In such case the guard-plate must be capable of beinginclined laterally, relatively to the bedplate of the planer, and to effect that, the supporting bracket 1O must be shifted from the perpendicular to the vertically inclined position. For that purpose we supply a bracket plate 18 fastened by screws 19 to the frame of the planer. The lower end of the bracket 18 has a lug 20 on the end of which is ivotally mounted at 21, an extension end 22 of the bracket 10*. Said bracket 10 has a swell 23 carrying a pin 24: which plays in the curved slot 25 of a curved arm 26 pro jecting from the bracket 18. A hand wheel 27 is rotated on the end of the screw end 28 of pin 2e, so that the bracket 10 can be thus fixed after vertically inclined adjustmentrelatively to the fixed bracket 18.

Having thus described our invention, we claim as new and desire to secure by Letters Patent 1. Tn a guard device for a planing machine, the combination with a guard-plate C having a pair of oppositely-disposed ears 3, 3, on its rearward edge, and a bearing rod a between said ears, of a bracket comprising 7 a bored hub 7 in which said rod is journaled, with a depending arm 5 having a longitudinal squared recess, a squared supportingrod 8 adapted to be mounted in sleeve-like relation to said depending bracket-arm, an adjusting screw 9 engaging said arm and rod, a longitudinally bored bracket 10 provided with ears 11, 11, adapted to be mounted on the frame of the machine, with which the lower end of the supporting rod is adapted to slidingly engage, and an adjusting screw 13 between said last mentioned elements.

2. A guard device for a machine of the class recited comprising a plate adapted to be supported over the bed-plate of the machine without contacting with the rotating knives therein, said plate having means to journal its rearward edge, a bracket forming an adjustable journal bearing therefor, and supporting devices for said journalbearing bracket, adapted to adjustably set the same and the guard plate in varying horizontal planes and also in varying planes vertically inclined from the horizontal.

3. A guard device of the class recited, comprising a plate adapted to be supported over the bed plate of the planing machine ,wit-hout contacting with the rotating knives thereof, a journal rod mounted on the rearward edge thereof, a bracket having a trans versely-disposed bored hub in which said. rod is ournaled, said hub-bracket being vertically recessed, a support-ing rod entering said recess in the bracket, means to adjustably fasten the rod therein, a second bracket adapted to be secured to the frame of the planing machine and having a lug on which aflixed our signatures this 23rd day of April the hub-bracket is pivoted, and a curved arm A. D. 1906.

having a slot therein, the hub-bracket hav- FREDERICK W. HALL. ing a pin operatively-engaging said slot GEORGE WV. BUMM. with means to lock the slot and pin at any Vitnesses: point of relative adjustment. J osnnn S. Klm'rz,

In testimony whereof, we have hereunto IDA E. THOMAS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

